如何从php或regex中的字符串末尾删除特定字符

Question

I am generating a string dynamically. For example The string looks like this

$string = "this-is-a-test-string-for-example-";

It can also be like this

$string = "this-is-a-test-string-for-example";

I want if there is a hyphen "-" at the end of the string, It should be removed. How can I do that in php or regex?

Answer 1

http://pl1.php.net/trim - that function gets characters to trim as last parameter

trim($string,"-");

or as suggested for right side only

rtrim($string,"-");

Answer 2

如果它总是在字符串的末尾（右侧），这将起作用

$string = rtrim($string,"-");

Answer 3

$cleanedString = preg_replace('/^(this-is-a-test-string-for-example)-$/', '$1', $string);

Answer 4

$delete = array('-');

if(in_array($string[(strlen($string)-1)], $delete))
    $string = substr($string, 0, strlen($string)-1);

You can add other characters to delete into $delete array.